Three of the world's most elite distance runners set out to break the two-hour marathon barrier after six months of technologically improved training. From testing in wind tunnels and running labs in the United States to balancing training with their daily lives in Eastern Africa to the final heart-pounding race in Italy, these pioneers embark on a global journey to achieve the unfathomable and break the two-hour mark.
Released: 2017-09-20
Genre: Documentary
Duration: 55 min
Production: National Geographic

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